An Airservices Australia fact sheet said wherever possible, the effects of aircraft noise on the community were minimised "as far as practical".

Most aircraft arriving on the new runway would remain over ocean, crossing the coastline at Mudjimba prior to landing. New runway departures would fly directly over Mudjimba and head out over the ocean.

Mudjimba's Cleveland Maltman is considering selling his Mudjimba home as he believes its value will drop with the new airport runway.Warren Lynam

Mr Maltman, who works in aviation, said he knew what his home was worth now, but not what it was going to be worth in 2022.

"I am very concerned about whether to move or downsize, I don't want to get out, but I am definitely concerned," Mr Maltman said.

"It's going to be louder. A lot louder. The sound will be the worst part.

"My fear is that people don't really know how much it's going to affect them. By the time that first jet takes off, it's too late.

"I've lived here all my life, you do grow accustomed to the noise, but it still means it's going to be worse off for my house and my family."